Oil-well casing and packing therefor.



C. W. RANDOLPH.

OIL WELL GASING-AND PAGKING THERBFOR.

'APPLICATION lILBD MAR. 22, 1912.

1,043,723; Patented Nov. 5, 1912.

, Mm am@ ONM@ a l y y UNITED sTATEs PATENT oEEIeE.

(umanitav w. RANDOLPH,

or vrvIAN, LOUISIANA.

OIL-WELL CASING AND PACKING THENFOB.

Specication of Letters Patent. Patented Nov'. 5, 1912; Application led Har'oh 22, 1912. Serial No. 685,598.4

To all 'whom 'it may' concern.' y

Be it vknown that I, CHARLES W. RAN- DoLrH, a citizen of the United States, resldling at Vivian, in the parish of Caddo and State of Louisiana, have invented certain new'and useful Improvements in Oll-Well Casings and Packing Therefor; and I do` hereby declare the following to be 'a f'ull, clear, and exact description of the invent-lon,

such as will enable others skilled in the art.

to which it appertains to makeAv and use the same The present invention relates to oil well.

casings and packings therefor, and has for its purpose to provide a construct-ion wherein both of these elements are incorporated in f itself assume its functional position, and

thereafter' effectively prevent any flowing of water from the ground above into the oil" well. With these and other objects in view the invention consists in the novel details of construction andcombinations of parts more fully hereinafter disclosed and particularly A pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification in which like numerals designate like parts in all the views -Figure 1 is a part elevation and oenftral sectional view of the combined' casing and packing; Fig. 2 is a front elevational view showing the packing elements in operative position; and Fig. 3 is a top plan sectional view taken on the line 3 3 of Fig. 1. Referring to the construction in detail, the same consists in a pipe 1 of multiple thick'- n'esses, and which is screw-threaded at its upper end to receive the usual conveyer pipe 2. Said pipe 1 is divided, or split, circumferentially, and for its greater portion, along the lines 3 and 4 to separate the thickness into separate elements '5, 6 and 7, arranged concentrically, as clearlyillustrated in Fig. 3. The element 5 constitutes thewell casing and projects below the lower edges of the elements 6 and 7, where it is provided withscrew threads 8 toreceive the usual casin shoe, not shown. Said casing 5 is integra ror unbroken', throughout, to the end Vof ivin'g an absolutely-closed conduit for the ow of oil through the pipe 2 leading above the ground. 7 The elements 6 and 7 are split, or divided axially of the pipe along the lines 9 and 10,

whereby to provide a plurality-of'segmem tal sections 11 and 11. Said sections constitute the packing for the casing and are adapted to be expansible, or readily reinovable, whereby to spread and have close en- .gagement against the earth of the well, and

...11'15 thatposition to form a water seal, preventing -water from above intermingling with the oil field, as heretofore stated.

It is proposed to design the construction so that water will not leak through the openings between the segment-al sect-1ons,and to that end the axially disposed cuts 9 and l10 are1 arranged in offset relation, and by reason ofwhich the outer series of sections 11 overlie the opening between the inner series of said sections, as in the manner illustrated in Figs. 2 and 3..

rlfhe innei series of segmental sections. '11

terminate above the'screw-t-hreaded end of l the casing 5, whereby to permit the application of the casing shoe, vand the Iowervedges of said members 11s are beveled, as at '12,to

provide a substantially' sharp periI veral edge. The outer series of lsections 11 erfni'- nate above the innerseries 11, whereby to leave an exposed rim or collar :1,3 on said .inner series 'when the parts thereof are in contpacted relation. And the lower edges of the sections 11 are beveled, as at14, but which are disposed inwardly, orin the reverse direction to that/ of the beveled edges 12.

The purpose of the" beveled edges '14: and` 12 is that the' former permit the packer to be easily lowered into the well without danger of the segments coming in contact with some obstruction and being pulled outwardly; and the latter (bevels 12) cut or shave the wall of the well and therefore form 'a packing.v

The expansible segments 11 and 11 are designed to be held in relatively contracted relation for the insertion' of the pipe to positionin the well boring, and to that end there is provided a readily releasable holding means, consisting of tie rods 15-.

which pass through the well casing 5 and engage with opposite pairs of segmental sections by having their respective ends 16 upset, as indicated in Fig. 1. Said rods 15 are designed to be readily breakable,where by the same may be broken and the segments 11 and 11a permitted to expand through the medium of any suitable device, such` as a stone or other object, which is dropped through the pipe 2 and casing 5, as will be understood.

,It is obvious that those skilled in the art may vary the details of construction and arrangement of parts without departing from the spirit of my invention, and, therefore, I do not Wish to be limited to such features except as may be required by the claims. l

What I claim is 1. The combination With a casing forV Wells, of a packing therefor comprising overlapping `expansible segmental sections, and means for holding said sections in relatively contracted position, substantially as described.

2. The combination with a` casing for Wells, of a packing therefor comprising eX- pansible elements formed integrally Wit-h said casing, substantially as described.

3. The combination With a casing for Wells, of a packing therefor comprising overlapping expansible segment-al sections formed .integrally With said casing, 'and means for holding said sections in relatively contracted position, substantially as described.

4. A combined casing and packing for wells comprising a pipe of multiple thicknesses, one of said thicknesses providing the Well casing, and the other of Asaid thick nesses providing pansible sections,

5. A combined a packing comprising eX- substantially as described. casing and packing for Wells comprising a pipe of multiple thicknesses, one of said thicknesses providing the Well casing, and the other of said thick-1 nesses providing a packing comprising segmental and overlapping expansible sections, substantially as described.

6. A combined casing and packing for Wells comprising a -pipe of multiple thicknesses divided longitudinally and circumferentially into an annular and segmental sections; said annular section providing the Well casing, and said segmental sectionsproviding a packing, substantially as described.

7. A combined casing and packing for wells comprising a pipe of multiple thicknesses divided longitudinally and circumferentially into an annular and segmental sections;` said annular section providing the well casing, and said segmental sections providing a packing, and releasable tie rods for holding said eXpansible sect-ions in relatively contracted -relation, substantially as described.

8. A combined 'casing and packing for Wells comprising a pipe of multiple and integral thicknesses divided longitudinally and circumferentially into an annular sect-ion, and overlapping segmental sections; said annular section providing the Well casing and said segmental sections providing an expansible packing; and a plurality of releasable tie rods for temporarily holding said expansible sections in relatively contracted relation, substantially as described.

In testimony whereof, I affix my signature, in presence of two Witnesses.

CHARLES W. RANDOLPH.

Witnesses:

S. C. IIEWES, C. KELLER. 

